Two or more sheets of glass with an inner layer of transparent plastic to which the glass adheres if broken. Used for enhanced safety and security, as well as sound reduction. [top]

See door leaf. [top]

Whenever used in a term or definition regarding the fenestration industry always refers to the outside, looking in.*Example* - an EDL (end dam left) refers to a end dam that gets installed in the left side of the deflection channel from the outside looking in, from the interior perspective it would be installed on the right hand side. [top]

The level or floor of the installation or the condition of perfect horizontal alignment. [top]

The ratio between the SHGC and VT. It provides a gauge of the relative efficiency of different glass or glazing types in transmitting daylight while blocking heat gains. The higher the number, the more light transmitted without adding excessive amounts of heat. [top]

A standard length profile or shape which is cut and processed to make window and door components. [top]

A structural component or beam above a window or door opening that supports the wall above. Also referred to as a header. [top]

An alternative to self adhesive membrane applied as a wet coat that takes approximately 2-4 hours to dry. Liquid membrane can be either silicone or urethane based, however if using a silicone membrane, silicone sealant must be used and if using a urethane based membrane, a urethane based sealant is required. [top]

A separately framed piece of glass in a window or door. A traditional double-hung window, for instance, often has several lights divided by muntins in each sash. [top]

A wall that supports loads in addition to its own weight. (Also, Bearing Wall) [top]

Metal slats, either movable or fixed; as in a door fitted with horizontal slats for admitting air and light and for deflecting rain. [top]

A special type of glass having a transparent material fused into its surface which acts as a thermal mirror; used to improve the "U" value of the glazing. [top]